Attachment for furnaces.



G. R. JARMAN.

ATTACHMENT FOR PURNAGES.

UPLIUATION FILED 53.16, 1914.

1,1 1 5,203. Patented 0613.27, 1914.

THE MORRIS4 PETERS COA. PHOTUJJTHA. WSNINGYUN. DV C.

UNITED STATES PATENT OFFICE.

GEORGE R. JARMAN, OF BALTIMORE, MARYLAND, ASSIG-NOR. OF FIFTY ONE-HUN'uDREDTHS TO WILLIAM A. IEATTHE'WS, OF BALTIMORE, MARYLAND.

ATTACHMENT FR` FURNACES.

Patented Oct. W3', 1914.

Application filed February 16, 1314. Serial No. 819,@06.

T0 all whom 'it may concern Be it known that I, GEORGE It. JARMAN, acitizen of the United States of America, and resident of Baltimore, inthe State of Maryland, have invented certain new and useful Improvementsin Attachments for Furnaces, of which the following is a specii'ication.

This invention relates to steam boiler, furnaces and the like andrelates particularly to smoke consuming attachments for such furnacesand` means for creating a draft through the fire bed.

An object of the present invention is to provide novel means foreffecting the injection of commingled steam and air into a furnace insuch relation to the fire bed as to aid in the combustion of the fuel,the said invention including novel means for heating` the air not onlythrough the contact of the steam` therewith but by the radiation ofsteam inaj conductor or conduit in such relation to the `air supplypassage as to eect a raising of the temperature of the air in itspassage to the furnace.

A still further object of this invention is to provide novel means forutilizing the steam for drawing air into the conduit leading to thefurnace, novel means being furthermore provided for separating moisturefrom the steam and for removing scale therefrom prior to its passage tothe interior of the furnace.

W'ith the foregoing and other objects in view, the rinvention consistsin the details of construction and in the arrangement and combination ofparts to be hereinafter more fully set forth and claimed.

In describing the invention in detail, reference will be had to theaccompanying drawings forming part of this specification wherein -likecharacters denote corresponding parts in the several views, and inwhich- Figure 1 illustrates a view in elevation of a furnace, the wallof which is broken away to illustrate the application of the inventionthereto; Fig. EZ illustrates a sectional view of the attachment, theinterior part thereof being in elevation; Fig. 3 illustrates an end viewshowing the outer end of the attachment in elevation; and Fig. L1illustrates an enlarged sectional view showing the means for supplyingsteam to the passage'leading to the furnace.

In these drawings 5 denotes a furnace which may be of any appropriateconstruction but is here shown as having two fuel supply openingscontrolled by the doors 6 and 7, said furnace having ash pits under thefire beds, the same being controlled by the doors 8 and 9.

In Fig. 1, I have shown diderent methods of connecting the smokeconsumer to the furnace, one example being that illustrated on the lefthand side of Fig. 1 where the attachment is applied to the door 8Whereas the method shown on the right hand side of Fig. 1 is to have theattachment projecting through a wall of the furnace in a direction atright angles to that at which the other attachment is applied.` Theillustration, therefore, will serve to show that the in vention issusceptible of use in different positions with relation to there bed andthe furnace casing as it is in most instances immaterial in what mannerthe smoke con* suming device is applied.

As a means for supplying commingled steam and air to the under surfaceof the lire bed so that it vmay pass through the fire bed and supportcombustion to such an extent as to prevent smoke arising as a part ofthe products of combustion, the invention comprises an intake pipe 104preferably con tracted or restricted at the inner end as shown at 11,whereas the outer end 12 is flared to form an air intake. The iared endcontrolled by a vdamper 15 which is mounted i on the stud 16 so as torotate in order that the openings 111 may be guarded or unguardedaccording to the volume of air to be admitted to the pipe.y 'By thismeans, the operator may acquire the proper mixture of steam and air tosupport combustion within the furnace and insure favorable results.

A steam supply pipe 17 leads from the steam dome 18 or from any othersuitable source of steam supply and within the pipe 10 is a steamconductor 19 shaped to form a coil 20, the said coil extending from thejunction of the pipe and its flared portion to a point near the innerend of said pipe, said pipe being then caused to terminate in a straightportion 21 extending through the coil axially of the pipe 10. By reasonof the arrangement of parts just indicated, steam is caused to traversethe coil to the inner end of the pipe l0 and then through the straightportion of the said conductor to a point near the outer end of the pipel0. The outer end of the conductor is provided With means for permittingthe escape' of steam so that the jets of steam diverge but flow in adirection` generally longitudinally of the pipe l0. In order toaccomplish the ductor for steam has a casing 22 formed of tivo curvedheads provided with flanges 23 and '24 secured together by fasteningssuch as l bolts 25'. The inner head has a seriesof apertures26 forming'jets for the escape of steam, and as4 stated, the said steam escapes inthe general direction of the length of the pipe l0 butl'ras someob'liquely disposed travel so that'E the st'eam in its passage throughthe pipe l0 Will serve to draw air through the iared end'of the pipewhich Will be miXed With the steam in its travel through the pipe' 10,the comniingling of thesaid steam and airbeing augmentedv by thepresence of the coiled -conductor in the pipe. The outer end -of thestraight portion 2l of the conductor extends'thro'ugh a perforated plate27 Which is secured between theflanges 23 and 24k, the said perforatedplate 27 `serving` to arrest scale Which may be in the steam and mois- Iture, due to any condensation: of the steam in" itspassage from theboiler to the conductor and said steam and scale may find its escapefrom the casing through the drain pipe 28.

WV hen the device isused on a door such as the door' Sin'Fig. l, itismoved from the position which it is shown as occupying` in Fig. 1,Whenthe door is opened. To facilitate movement of the door With theattachment applied thereto, a flexible conduit 29 extends from'the steampipe 17 to theV conductor 19. p

Fromy an inspection of thedravvingl and the foregoing description, itWill loe appar-v entthat'the air heated by the contact of the live steamtherewithA and by the heat radithel pipe l0 as to serve to supportcombussteam passes to the Vthfe head.

tion in that heated oxygen is supplied to the lire bed in suchquantities or proportions as Vprotecting the grate bars by reason of thefact that the current of air and steampasses around or between the gratebars in its pas? sage to the fire bed. result intended, the outer en'dof the con'- ,Y j I l claim; t y j l. In an attachment for furnaces, apipe adapted to feed air to a furnace, a steam conductoryhaving'aportion thereof coiled Withinthe pipe andan extremity of Isaidcondi'ietor eXten'ding lon'gitudinally of the pipewithin; the coiledlportion of the conductor, a

heatlonthe enteren'd of the straight portion of the' conductor, saidyhead haifin'gy jets formed therein for the escape of steannsaid j etsdischargingv lon pipe.

2. yIn an attachment for furnaces, a pipe adapted to feed air to afurnace, means for controlling the outer end thereof, a steam conduetorh"aviifgV a coiled portion extending longitudinally of the pipe, and astraight portion extendingl through the coil, said straight portionterminatingnear theouter end of the pipe, a head on the outer end ofthe' conductor, said head having vjets therein, and' perforated platein' `the vhead through which steam 'passes to the'jets.

gitu'dinally of the said'` 3. vn an' attachment for'furi'iaces, a' pipeadapted to feed air to a furnace, means for l controlling the outerend'thereof, a'steam conductor having acoiled portion extendinglongitudinally of the pipe, a straight portion' extending through thesaid c oil, said straight portion terminating near the outer end ofthe'pip'e, a vhead on the outer end of the conductor', said head havingjets therein,` a perforated plate inthe head through Which In testimonywhereof, Iafhx my signature iin the presence of `tWo 'Witnesses'.ating'fron'i 'the conductor Within the pipe 10 will so raise thetemperature of the air and j steam as it emerges from the inner end ofGEORGE R.' JARMAN, "Witnesses: j

LEE P. HOOVER, JULIS Gr. J. GUDE.

Copies of `this patentmay be obtained fori-live cents each, byaddressing the Commissioner of Patents,

Washngtdn, G.

jets, and ya'drain pipein

